Portable cooler



FIG. 1 is a right side perspective view of a portable cooler showing my new design.

FIG. 2 is a left side perspective view thereof.

FIG. 3 is an enlarged perspective view thereof of the detail 3-3 in FIG. 1.

FIG. 4 is a perspective view thereof of the detail 4-4 of FIG. 1.

FIG. 5 is a front view thereof; and,

FIG. 6 is a top plan view thereof.

The portions of the portable cooler shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a portable cooler, as shown and described. 